kmemtrace: SLOB hooks.
[linux-2.6/kmemtrace.git] / drivers / net / gianfar_ethtool.c
blob6007147cc1e917c08e79b636d18e6fff56d1040e
1 /*
2 * drivers/net/gianfar_ethtool.c
4 * Gianfar Ethernet Driver
5 * Ethtool support for Gianfar Enet
6 * Based on e1000 ethtool support
8 * Author: Andy Fleming
9 * Maintainer: Kumar Gala
11 * Copyright (c) 2003,2004 Freescale Semiconductor, Inc.
13 * This software may be used and distributed according to
14 * the terms of the GNU Public License, Version 2, incorporated herein
15 * by reference.
18 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/errno.h>
21 #include <linux/slab.h>
22 #include <linux/interrupt.h>
23 #include <linux/init.h>
24 #include <linux/delay.h>
25 #include <linux/netdevice.h>
26 #include <linux/etherdevice.h>
27 #include <linux/skbuff.h>
28 #include <linux/spinlock.h>
29 #include <linux/mm.h>
31 #include <asm/io.h>
32 #include <asm/irq.h>
33 #include <asm/uaccess.h>
34 #include <linux/module.h>
35 #include <linux/crc32.h>
36 #include <asm/types.h>
37 #include <linux/ethtool.h>
38 #include <linux/mii.h>
39 #include <linux/phy.h>
41 #include "gianfar.h"
43 extern void gfar_start(struct net_device *dev);
44 extern int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit);
46 #define GFAR_MAX_COAL_USECS 0xffff
47 #define GFAR_MAX_COAL_FRAMES 0xff
48 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
49 u64 * buf);
50 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf);
51 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
52 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
53 static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
54 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
55 static void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo);
57 static char stat_gstrings[][ETH_GSTRING_LEN] = {
58 "rx-dropped-by-kernel",
59 "rx-large-frame-errors",
60 "rx-short-frame-errors",
61 "rx-non-octet-errors",
62 "rx-crc-errors",
63 "rx-overrun-errors",
64 "rx-busy-errors",
65 "rx-babbling-errors",
66 "rx-truncated-frames",
67 "ethernet-bus-error",
68 "tx-babbling-errors",
69 "tx-underrun-errors",
70 "rx-skb-missing-errors",
71 "tx-timeout-errors",
72 "tx-rx-64-frames",
73 "tx-rx-65-127-frames",
74 "tx-rx-128-255-frames",
75 "tx-rx-256-511-frames",
76 "tx-rx-512-1023-frames",
77 "tx-rx-1024-1518-frames",
78 "tx-rx-1519-1522-good-vlan",
79 "rx-bytes",
80 "rx-packets",
81 "rx-fcs-errors",
82 "receive-multicast-packet",
83 "receive-broadcast-packet",
84 "rx-control-frame-packets",
85 "rx-pause-frame-packets",
86 "rx-unknown-op-code",
87 "rx-alignment-error",
88 "rx-frame-length-error",
89 "rx-code-error",
90 "rx-carrier-sense-error",
91 "rx-undersize-packets",
92 "rx-oversize-packets",
93 "rx-fragmented-frames",
94 "rx-jabber-frames",
95 "rx-dropped-frames",
96 "tx-byte-counter",
97 "tx-packets",
98 "tx-multicast-packets",
99 "tx-broadcast-packets",
100 "tx-pause-control-frames",
101 "tx-deferral-packets",
102 "tx-excessive-deferral-packets",
103 "tx-single-collision-packets",
104 "tx-multiple-collision-packets",
105 "tx-late-collision-packets",
106 "tx-excessive-collision-packets",
107 "tx-total-collision",
108 "reserved",
109 "tx-dropped-frames",
110 "tx-jabber-frames",
111 "tx-fcs-errors",
112 "tx-control-frames",
113 "tx-oversize-frames",
114 "tx-undersize-frames",
115 "tx-fragmented-frames",
118 /* Fill in a buffer with the strings which correspond to the
119 * stats */
120 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
122 struct gfar_private *priv = netdev_priv(dev);
124 if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
125 memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
126 else
127 memcpy(buf, stat_gstrings,
128 GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
131 /* Fill in an array of 64-bit statistics from various sources.
132 * This array will be appended to the end of the ethtool_stats
133 * structure, and returned to user space
135 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf)
137 int i;
138 struct gfar_private *priv = netdev_priv(dev);
139 u64 *extra = (u64 *) & priv->extra_stats;
141 if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
142 u32 __iomem *rmon = (u32 __iomem *) & priv->regs->rmon;
143 struct gfar_stats *stats = (struct gfar_stats *) buf;
145 for (i = 0; i < GFAR_RMON_LEN; i++)
146 stats->rmon[i] = (u64) gfar_read(&rmon[i]);
148 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
149 stats->extra[i] = extra[i];
150 } else
151 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
152 buf[i] = extra[i];
155 static int gfar_sset_count(struct net_device *dev, int sset)
157 struct gfar_private *priv = netdev_priv(dev);
159 switch (sset) {
160 case ETH_SS_STATS:
161 if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
162 return GFAR_STATS_LEN;
163 else
164 return GFAR_EXTRA_STATS_LEN;
165 default:
166 return -EOPNOTSUPP;
170 /* Fills in the drvinfo structure with some basic info */
171 static void gfar_gdrvinfo(struct net_device *dev, struct
172 ethtool_drvinfo *drvinfo)
174 strncpy(drvinfo->driver, DRV_NAME, GFAR_INFOSTR_LEN);
175 strncpy(drvinfo->version, gfar_driver_version, GFAR_INFOSTR_LEN);
176 strncpy(drvinfo->fw_version, "N/A", GFAR_INFOSTR_LEN);
177 strncpy(drvinfo->bus_info, "N/A", GFAR_INFOSTR_LEN);
178 drvinfo->regdump_len = 0;
179 drvinfo->eedump_len = 0;
183 static int gfar_ssettings(struct net_device *dev, struct ethtool_cmd *cmd)
185 struct gfar_private *priv = netdev_priv(dev);
186 struct phy_device *phydev = priv->phydev;
188 if (NULL == phydev)
189 return -ENODEV;
191 return phy_ethtool_sset(phydev, cmd);
195 /* Return the current settings in the ethtool_cmd structure */
196 static int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
198 struct gfar_private *priv = netdev_priv(dev);
199 struct phy_device *phydev = priv->phydev;
201 if (NULL == phydev)
202 return -ENODEV;
204 cmd->maxtxpkt = priv->txcount;
205 cmd->maxrxpkt = priv->rxcount;
207 return phy_ethtool_gset(phydev, cmd);
210 /* Return the length of the register structure */
211 static int gfar_reglen(struct net_device *dev)
213 return sizeof (struct gfar);
216 /* Return a dump of the GFAR register space */
217 static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
219 int i;
220 struct gfar_private *priv = netdev_priv(dev);
221 u32 __iomem *theregs = (u32 __iomem *) priv->regs;
222 u32 *buf = (u32 *) regbuf;
224 for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
225 buf[i] = gfar_read(&theregs[i]);
228 /* Convert microseconds to ethernet clock ticks, which changes
229 * depending on what speed the controller is running at */
230 static unsigned int gfar_usecs2ticks(struct gfar_private *priv, unsigned int usecs)
232 unsigned int count;
234 /* The timer is different, depending on the interface speed */
235 switch (priv->phydev->speed) {
236 case SPEED_1000:
237 count = GFAR_GBIT_TIME;
238 break;
239 case SPEED_100:
240 count = GFAR_100_TIME;
241 break;
242 case SPEED_10:
243 default:
244 count = GFAR_10_TIME;
245 break;
248 /* Make sure we return a number greater than 0
249 * if usecs > 0 */
250 return ((usecs * 1000 + count - 1) / count);
253 /* Convert ethernet clock ticks to microseconds */
254 static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int ticks)
256 unsigned int count;
258 /* The timer is different, depending on the interface speed */
259 switch (priv->phydev->speed) {
260 case SPEED_1000:
261 count = GFAR_GBIT_TIME;
262 break;
263 case SPEED_100:
264 count = GFAR_100_TIME;
265 break;
266 case SPEED_10:
267 default:
268 count = GFAR_10_TIME;
269 break;
272 /* Make sure we return a number greater than 0 */
273 /* if ticks is > 0 */
274 return ((ticks * count) / 1000);
277 /* Get the coalescing parameters, and put them in the cvals
278 * structure. */
279 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
281 struct gfar_private *priv = netdev_priv(dev);
283 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
284 return -EOPNOTSUPP;
286 if (NULL == priv->phydev)
287 return -ENODEV;
289 cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, priv->rxtime);
290 cvals->rx_max_coalesced_frames = priv->rxcount;
292 cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, priv->txtime);
293 cvals->tx_max_coalesced_frames = priv->txcount;
295 cvals->use_adaptive_rx_coalesce = 0;
296 cvals->use_adaptive_tx_coalesce = 0;
298 cvals->pkt_rate_low = 0;
299 cvals->rx_coalesce_usecs_low = 0;
300 cvals->rx_max_coalesced_frames_low = 0;
301 cvals->tx_coalesce_usecs_low = 0;
302 cvals->tx_max_coalesced_frames_low = 0;
304 /* When the packet rate is below pkt_rate_high but above
305 * pkt_rate_low (both measured in packets per second) the
306 * normal {rx,tx}_* coalescing parameters are used.
309 /* When the packet rate is (measured in packets per second)
310 * is above pkt_rate_high, the {rx,tx}_*_high parameters are
311 * used.
313 cvals->pkt_rate_high = 0;
314 cvals->rx_coalesce_usecs_high = 0;
315 cvals->rx_max_coalesced_frames_high = 0;
316 cvals->tx_coalesce_usecs_high = 0;
317 cvals->tx_max_coalesced_frames_high = 0;
319 /* How often to do adaptive coalescing packet rate sampling,
320 * measured in seconds. Must not be zero.
322 cvals->rate_sample_interval = 0;
324 return 0;
327 /* Change the coalescing values.
328 * Both cvals->*_usecs and cvals->*_frames have to be > 0
329 * in order for coalescing to be active
331 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
333 struct gfar_private *priv = netdev_priv(dev);
335 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
336 return -EOPNOTSUPP;
338 /* Set up rx coalescing */
339 if ((cvals->rx_coalesce_usecs == 0) ||
340 (cvals->rx_max_coalesced_frames == 0))
341 priv->rxcoalescing = 0;
342 else
343 priv->rxcoalescing = 1;
345 if (NULL == priv->phydev)
346 return -ENODEV;
348 /* Check the bounds of the values */
349 if (cvals->rx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
350 pr_info("Coalescing is limited to %d microseconds\n",
351 GFAR_MAX_COAL_USECS);
352 return -EINVAL;
355 if (cvals->rx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
356 pr_info("Coalescing is limited to %d frames\n",
357 GFAR_MAX_COAL_FRAMES);
358 return -EINVAL;
361 priv->rxtime = gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs);
362 priv->rxcount = cvals->rx_max_coalesced_frames;
364 /* Set up tx coalescing */
365 if ((cvals->tx_coalesce_usecs == 0) ||
366 (cvals->tx_max_coalesced_frames == 0))
367 priv->txcoalescing = 0;
368 else
369 priv->txcoalescing = 1;
371 /* Check the bounds of the values */
372 if (cvals->tx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
373 pr_info("Coalescing is limited to %d microseconds\n",
374 GFAR_MAX_COAL_USECS);
375 return -EINVAL;
378 if (cvals->tx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
379 pr_info("Coalescing is limited to %d frames\n",
380 GFAR_MAX_COAL_FRAMES);
381 return -EINVAL;
384 priv->txtime = gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs);
385 priv->txcount = cvals->tx_max_coalesced_frames;
387 if (priv->rxcoalescing)
388 gfar_write(&priv->regs->rxic,
389 mk_ic_value(priv->rxcount, priv->rxtime));
390 else
391 gfar_write(&priv->regs->rxic, 0);
393 if (priv->txcoalescing)
394 gfar_write(&priv->regs->txic,
395 mk_ic_value(priv->txcount, priv->txtime));
396 else
397 gfar_write(&priv->regs->txic, 0);
399 return 0;
402 /* Fills in rvals with the current ring parameters. Currently,
403 * rx, rx_mini, and rx_jumbo rings are the same size, as mini and
404 * jumbo are ignored by the driver */
405 static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
407 struct gfar_private *priv = netdev_priv(dev);
409 rvals->rx_max_pending = GFAR_RX_MAX_RING_SIZE;
410 rvals->rx_mini_max_pending = GFAR_RX_MAX_RING_SIZE;
411 rvals->rx_jumbo_max_pending = GFAR_RX_MAX_RING_SIZE;
412 rvals->tx_max_pending = GFAR_TX_MAX_RING_SIZE;
414 /* Values changeable by the user. The valid values are
415 * in the range 1 to the "*_max_pending" counterpart above.
417 rvals->rx_pending = priv->rx_ring_size;
418 rvals->rx_mini_pending = priv->rx_ring_size;
419 rvals->rx_jumbo_pending = priv->rx_ring_size;
420 rvals->tx_pending = priv->tx_ring_size;
423 /* Change the current ring parameters, stopping the controller if
424 * necessary so that we don't mess things up while we're in
425 * motion. We wait for the ring to be clean before reallocating
426 * the rings. */
427 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
429 struct gfar_private *priv = netdev_priv(dev);
430 int err = 0;
432 if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
433 return -EINVAL;
435 if (!is_power_of_2(rvals->rx_pending)) {
436 printk("%s: Ring sizes must be a power of 2\n",
437 dev->name);
438 return -EINVAL;
441 if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
442 return -EINVAL;
444 if (!is_power_of_2(rvals->tx_pending)) {
445 printk("%s: Ring sizes must be a power of 2\n",
446 dev->name);
447 return -EINVAL;
450 if (dev->flags & IFF_UP) {
451 unsigned long flags;
453 /* Halt TX and RX, and process the frames which
454 * have already been received */
455 spin_lock_irqsave(&priv->txlock, flags);
456 spin_lock(&priv->rxlock);
458 gfar_halt(dev);
459 gfar_clean_rx_ring(dev, priv->rx_ring_size);
461 spin_unlock(&priv->rxlock);
462 spin_unlock_irqrestore(&priv->txlock, flags);
464 /* Now we take down the rings to rebuild them */
465 stop_gfar(dev);
468 /* Change the size */
469 priv->rx_ring_size = rvals->rx_pending;
470 priv->tx_ring_size = rvals->tx_pending;
472 /* Rebuild the rings with the new size */
473 if (dev->flags & IFF_UP)
474 err = startup_gfar(dev);
476 return err;
479 static int gfar_set_rx_csum(struct net_device *dev, uint32_t data)
481 struct gfar_private *priv = netdev_priv(dev);
482 int err = 0;
484 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
485 return -EOPNOTSUPP;
487 if (dev->flags & IFF_UP) {
488 unsigned long flags;
490 /* Halt TX and RX, and process the frames which
491 * have already been received */
492 spin_lock_irqsave(&priv->txlock, flags);
493 spin_lock(&priv->rxlock);
495 gfar_halt(dev);
496 gfar_clean_rx_ring(dev, priv->rx_ring_size);
498 spin_unlock(&priv->rxlock);
499 spin_unlock_irqrestore(&priv->txlock, flags);
501 /* Now we take down the rings to rebuild them */
502 stop_gfar(dev);
505 priv->rx_csum_enable = data;
507 if (dev->flags & IFF_UP)
508 err = startup_gfar(dev);
510 return err;
513 static uint32_t gfar_get_rx_csum(struct net_device *dev)
515 struct gfar_private *priv = netdev_priv(dev);
517 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
518 return 0;
520 return priv->rx_csum_enable;
523 static int gfar_set_tx_csum(struct net_device *dev, uint32_t data)
525 unsigned long flags;
526 struct gfar_private *priv = netdev_priv(dev);
528 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
529 return -EOPNOTSUPP;
531 spin_lock_irqsave(&priv->txlock, flags);
532 gfar_halt(dev);
534 if (data)
535 dev->features |= NETIF_F_IP_CSUM;
536 else
537 dev->features &= ~NETIF_F_IP_CSUM;
539 gfar_start(dev);
540 spin_unlock_irqrestore(&priv->txlock, flags);
542 return 0;
545 static uint32_t gfar_get_tx_csum(struct net_device *dev)
547 struct gfar_private *priv = netdev_priv(dev);
549 if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
550 return 0;
552 return (dev->features & NETIF_F_IP_CSUM) != 0;
555 static uint32_t gfar_get_msglevel(struct net_device *dev)
557 struct gfar_private *priv = netdev_priv(dev);
558 return priv->msg_enable;
561 static void gfar_set_msglevel(struct net_device *dev, uint32_t data)
563 struct gfar_private *priv = netdev_priv(dev);
564 priv->msg_enable = data;
568 const struct ethtool_ops gfar_ethtool_ops = {
569 .get_settings = gfar_gsettings,
570 .set_settings = gfar_ssettings,
571 .get_drvinfo = gfar_gdrvinfo,
572 .get_regs_len = gfar_reglen,
573 .get_regs = gfar_get_regs,
574 .get_link = ethtool_op_get_link,
575 .get_coalesce = gfar_gcoalesce,
576 .set_coalesce = gfar_scoalesce,
577 .get_ringparam = gfar_gringparam,
578 .set_ringparam = gfar_sringparam,
579 .get_strings = gfar_gstrings,
580 .get_sset_count = gfar_sset_count,
581 .get_ethtool_stats = gfar_fill_stats,
582 .get_rx_csum = gfar_get_rx_csum,
583 .get_tx_csum = gfar_get_tx_csum,
584 .set_rx_csum = gfar_set_rx_csum,
585 .set_tx_csum = gfar_set_tx_csum,
586 .get_msglevel = gfar_get_msglevel,
587 .set_msglevel = gfar_set_msglevel,